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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #ifndef TOOLS_BLINK_GC_PLUGIN_TRACING_STATUS_H_ |
| 6 #define TOOLS_BLINK_GC_PLUGIN_TRACING_STATUS_H_ |
| 7 |
| 8 // TracingStatus is a three-point value ordered by unneeded < unknown < needed. |
| 9 class TracingStatus { |
| 10 public: |
| 11 static TracingStatus Unneeded() { return kUnneeded; } |
| 12 static TracingStatus Unknown() { return kUnknown; } |
| 13 static TracingStatus Needed() { return kNeeded; } |
| 14 bool IsUnneeded() const { return status_ == kUnneeded; } |
| 15 bool IsUnknown() const { return status_ == kUnknown; } |
| 16 bool IsNeeded() const { return status_ == kNeeded; } |
| 17 TracingStatus LUB(const TracingStatus& other) const { |
| 18 return status_ > other.status_ ? status_ : other.status_; |
| 19 } |
| 20 bool operator==(const TracingStatus& other) const { |
| 21 return status_ == other.status_; |
| 22 } |
| 23 private: |
| 24 enum Status { kUnneeded, kUnknown, kNeeded }; |
| 25 TracingStatus(Status status) : status_(status) {} |
| 26 Status status_; |
| 27 }; |
| 28 |
| 29 #endif // TOOLS_BLINK_GC_PLUGIN_TRACING_STATUS_H_ |
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